Reactions of the halogens: including displacement practical
I can write word and symbol equations to show how Group 7 elements react.
Reactions of the halogens: including displacement practical
I can write word and symbol equations to show how Group 7 elements react.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Halogens can be dissolved in water to form acidic solutions.
- A more reactive halogen can displace a less reactive one from a compound.
- Group 7 elements react with Group 1 and 2 metals to form salts.
- The chemical test for chlorine involves passing the gas over damp blue litmus paper.
Keywords
Displacement - reaction is where a more reactive element replaces a less reactive element in a compound.
Solution - is formed when a substance dissolves in a liquid.
Halides - are the name of salts formed from halogens, e.g. sodium chloride (NaCl).
Common misconception
Halogen solutions are coloured and sometimes it can be difficult to determine colour changes during displacement reactions.
Displacement of iodine gives the darkest colour change (turns brown), while bromine will provide one which is lighter (turns orange).
To help you plan your year 11 chemistry lesson on: Reactions of the halogens: including displacement practical, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 11 chemistry lesson on: Reactions of the halogens: including displacement practical, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 4 chemistry lessons from the Groups of the periodic table unit, dive into the full secondary chemistry curriculum, or learn more about lesson planning.
Equipment
Chlorine, bromine and iodine solutions, chloride, bromide and iodide solutions (Group 1 halides work well), spotting tiles and pasteur pipettes.
Content guidance
- Risk assessment required - equipment
Supervision
Adult supervision required
Licence
Lesson video
Loading...
Starter quiz
6 Questions
Ionic compounds formed from positive and negative ions.
A salt formed from a halogen.
Two atoms of the same type chemically bonded together.
Non metallic elements which react with metals to form halide salts.